Question

Question was provided via image upload.

Explanation:

To solve this, we analyze the properties of sodium (Na) and chlorine (Cl):

• Na is a metal (loses electrons to achieve stability).
• Cl is a non - metal (gains electrons to achieve stability).
• Na loses 1 electron (since it has 1 valence electron, losing it gives a stable octet).
• Cl gains 1 electron (it has 7 valence electrons, gaining 1 gives a stable octet).
• When a metal and non - metal interact in this way (electron transfer), they form an ionic bond.

Answer:

• Na is a $\boldsymbol{\text{metal}}$ and Cl is a $\boldsymbol{\text{non - metal}}$.
• Na $\boldsymbol{\text{loses}}$ 1 electron, Cl $\boldsymbol{\text{gains}}$ 1 electron.
• Forms an $\boldsymbol{\text{ionic}}$ bond.